Improvement in extension-gasaliers



UNITED STATE$ PATENT OFFICE.

EDWIN RUSSELL, ()F HAVEN, CONNECTICUT.

IMPROVEMENT IN EXTENSlON-GASALIERS.

Specification forming part of Letters Patent No. 162,694, dated April27, 1875; application filed January 18, 1875.

To all whom it may concern:

Be it known that I, Enwnv RUssELL, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new Extension-Gasalier;and I do hereby declare the following, when taken in connection with theaccompanying drawings and the letters of reference marked thereon, to bea full, clear, and exact description of the same, and which saiddrawings constitute part of this specification, and represent, ill-Figure 1, side view; Fig. 2, transverse section in line aan, enlarged;Fig. 3, vertical sectional view, enlarged.

This invention relates to an improvement in that class of gas-fixturesin which one or more of the burners are arranged to be drawn down, orheld at difi'erent elevations. This invention consists in an inner tubearranged to slide within an outer tube, the said outer tube slottedvertically, and combined with a flexible tube, one end of whichcommunicates with a stationary part of the gasalier, and the otherconnected to the said inner tube through the slot in the outer tube, andin combining with such parts a pan or receiver, moving with the innertube to support the slack of the said flexible tubes; also, in apeculiar frictional device, for holding the said inner tube at anydesired point of elevation, as more fully hereinafter described.

A is the inner tube, to which the burner or burners to be movable areattached, in the usual manner; B, the outer tube, permanently attachedat its upper end to the stationary part of the gasalier, or to thesupply-pipe, but not communicating therewith. This tube B has a verticalslot, 0, equal, at least, to the extent of movement desired, and openingdirectly to the inner tube A, as seen in Fig. 2. To the stationary partD, or other convenient point, one end of a flexible tube, E, isattached, opening directly to the supply, and coiled around the tube B.The other end is attached to and opens into the inner movable tube A, asseen in Fig. 2, through the slot C in the outer tube. This flexible tubeconducts the gas from the supply-pipe to the inner tube. The slot in theouter tube allows the inner tube, with the lower end of the flexibletube, to be drawn down or raised, as denoted in Fig. 1, the coils of theflexible tube allowing such movement. In order that the flexible tubemay be held up, and prevented from hanging loosely down when the innertube is raised, a pan, F, surrounding the outer tube and attached to theinner tube, is arranged below the connection of the flexible tube withthe inner tube hence, when the tube is raised, the coils or folds willbe caught and held in the said pan. Some frictional device is necessaryto support the inner tube and its burner at any required elevation. Todo this a pair of cams, L, are arranged in connection with the outertube, carrying in their face a roll, at. These press against the surfaceof the tube A, so that the radial bearing-line of said cams cannot comedown into the same plane hence the cams grasp the tube A with sufficientforce to hold it up, but yet so that, by the application of a littlemore power than the weight of the tube A, and its attachments, the tubemay be drawn down. On raising the tube A the cams yield, as denoted inbroken lines, Fig. 3, and entirely remove the friction during the upwardmovement of the tube.

I claiml. The combination of the inner movable tube A, the slotted outertube B, and the flexible conducting-tube E, substantially as and for thepurpose specified.

2. The combination of theinner movabletube A with the slotted tube B,flexible conducting-tube E, and pan F, substantially as and for thepurpose specified.

3. The combination of the inner movable tube A, outer tube B, and cams LL, each carrying a roll, a, in its face, substantial] y as and for thepurpose specified.

EDWIN RUSSELL.

Witnesses:

JOHN E. EARLE, G. V. FORBES.

